Error code Description Action
121.30 Fuser failed to reach printing temperature by the time
a page reached the fuser.
Go to “Fuser service check” on page 120.
121.31 Fuser is too hot. Global temperature check.
121.32 Open fuser main thermistor.
121.33 Open fuser edge thermistor.
121.34 Open fuser backup roll thermistor.
121.35 Attempting to POR after receiving a 121.34.
121.36 Fuser did not heat to allow compression jog.
121.37 Fuser heated faster than allowed during line voltage
detection.
Fuser service check
Action Yes No
Step 1
a Restore the engine settings to their defaults:
Diagnostics Menu > Printer Setup > Defaults
b Restore the EP setup settings to their defaults:
Diagnostics Menu > EP Setup > Defaults
Does the problem remain?
Go to step 2. The problem is solved.
Step 2
• Check the fuser cables JTHERM1 and JEXIT for proper connection to
the controller board.
• Check the cable PCN5 for proper connection to the power supply.
Are they properly connected?
Go to step 3. Reseat the cables.
Step 3
Are the cables JTHERM1, JEXIT and PCN5 free of damage?
Go to step 4. Replace the fuser. See
“Fuser removal” on
page 320.
Step 4
a Turn off the printer.
b Remove the rear door and cover.
c Disconnect the fuser cable connected to PCN5 of the power supply.
d Check for approximate correct resistance on the fuser cable:
• 220V fuser—43 ohms
• 110V fuser—10 ohms
• 100V fuser—8 ohms
Is the resistance equal to any of the above values?
Perform an LVPS
service check. See
“LVPS service check”
on page 121.
Replace the fuser. See
“Fuser removal” on
page 320.
7016
Diagnostic information
120
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